Dumping-wagon.



PATENTED JUNE 7, 1904.

W. 0. SHADBOLT.

DUMPING WAGON. APPLICATION FILED OUT. 16, 1903.

2 SHEETS-SHEBT 1.

N0 MODEL.

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UNITED STAT S" Patented June *7, 1904.

PATENT, OFFICE.

DUMPlNG-WAGON.

SPECIFICATION forming part of Letters Patent No. 761,921, dated June '7,1904..

Application filed October 16, 1903.

To all whom it noay concern:

Be it known that I, WILLIAM OSCAR SHAD- BOLT, a citizen of the UnitedStates, residing in the borough of Brooklyn, in the county of Kings andcity and State of New York, have invented certain new and usefulImprovements 7 in Dumping-VVagons, of which the following is aspecification.

This invention relates to the class of fourwheeled dumping-wagonswherein the dumping-body is actuated for dumping by means of a rack andpinion or like means; and the object of the present invention is to somount the body that it may be in stable equilibrium when it its normalposition on the frame and will require to be moved rearward to thedumping-point and to provide hand-operated mechanism for shifting thedumping-body, said mechanisms having aslotted connection with said body,whereby the latter may dump without communicating its movement to thesaid operating mechanism, all as will be hereinafter explained. v

In the accompanying drawings, which illustrate an embodiment of theinvention, Figure 1 is a side View of the dumping-wagon, showing thebody in its normal position on the frame. Fig. 2 is a similar view,showing the body dumped. In both of these views some parts are brokenaway to illustrate better the construction. Fig. 3 is a transversesection taken at line in Fig. 2. Fig. 1 is an under 1 side view of theframe and body. Fig. 5 shows the fulcrum-stud and keeper in detail.

Fig. 6 illustrates another dumping meanswhere a chain is substituted forthe rack and pinion.

Referring primarily to the first five figures of the drawings, 1 is theframe of the wagon, supported in the usual manner on wheels 2. As theframe and wheels may be of substantially the usual construction and theframe may be mounted on the axles through a fifthwheel and springs of aknown kind and construction, no special description of these will berequired.

8 is the dumping-body, slidable on the frame. At the sides of theframe,'near the hinder end Serial No. 177,255. (No model.)

thereof, are two roller fulcrum-studs 4, one at each side, and at eachside the body 3 has rigidly secured to it a slot-stirrup or keeper 5,whichengages the said fulcrumstud-that is to say, under and to thebottom side rail of the body is secured the keeper 5, which may beconveniently of iron or steel, and this keeper forms a limiting-slotalong which the fulcrum-stud 4: plays when the body is being moved backin dumping. The forward end of said keeper impinges on the fulcrum-stud,and thus arrests the rearward movement of the wagon-body. V

The device or mechanism for moving the dumping-body comprises a rack 6,mounted in guides 7, Fig. 3, in the frame and extending lengthwise ofthe latter, and a pinion 8, gearing with said rack, said pinion beingfixed on a shaft 9, rotatively mounted in suitable ]oearings on theframe and extending transversely thereof. This shaft has a crank 10 atone of its ends, said crank being preferably removable. On the back orupper side of the rack is formed a slot 11, which is engaged by a roller-stud 12 in a link 13, the other end of said link being pivotallyconnectedto the body 3 at the point 14, which is located considerablyforward of the longitudinal center of the body.

The operation in dumping is as follows: The body 3 being in its normalforward position, as seen in Fig. 1, with the stud 12 at the rear end ofthe rack-slot 11 and the link 13 occupying a nearlyhorizontal position,the operator applies the crank 10 to the pinionshaft 9 and by turning itdrives the rack 6 to the rear. wagon-body until said rack shall havemoved to the rear a distance equivalent to about the length of the slot11, when the end wall of said slot will abut against the stud 12 on thelink 13 and through this link the wagon-body will be moved to the rear.The body will beginto dump when it reaches a position of unstableequilibrium,. turning then about the fulcrum-studs 4: and its tail willdrop suddenly This drop would put a sud.-

to the ground.

The rack does not act to move the den strain on the rack and pinion, andperhaps also cause injury to the operator through the sudden andforcible rotation of the crank, but for the fact of the slottedconnection of the body with the rack. \Vhen the body starts to dump, thestud 12 is at the front end of the keeper-slot 11, and this slot will beof such length that when the body dumps the said stud will merely moverearward along the keeper-slot on the rack without imparting anymovementto the rack at all. After the load is dumped the empty body isfirst brought down level upon the frame by means of the rack and pinionand then drawn forward to its normal position. The righting of the emptybody is rendered the more easy because of the fact that thecoupling-point 14: is set so far forward that after the body is dumpedthe link 13 will be found disposed (see Fig. 2) forty-five degrees withthe frame and at about a right angle with dumped body. The dumpingoperation will vary, of course, somewhat with the disposition of thecenter of gravity of the load in the body and also with the character ofthe material constituting the load. If the center of gravity is well tothe tail of the body, the dump will take place automatically when thebody is moved back and relatively early, and if the center of gravity iswell forward the operator will have to assist in dumping or tilting thebody after the forward ends of the keepers 5 shall have impinged on thestuds 4. If the Weight of the load is distributed uniformly, the bodywill begin to dump when the forward ends of the keepers 5 shall havereached the fulcrum-studs.

It will be noted that the important feature of this invention is theslotted connection between the Wagon-body and the means for moving thebody on the frame, which construction permits the body to dump withoutthrowing a sudden strain or jar on said operating means, and accordingto thepresentinvention this object is attained by employing a rigid orstiff link coupled at one end to the body Well forward of thedumping-fulcrum and extending thence forward, being coupled at the otherend to the operating means, the connection at one end of said link beingslotted, so that when the body tilts in dumping its movement will beindependent of the operating means. The body is pushed to the rear fordumping and pulled or drawn for bringing it back to its place on theframe. In the construction described the means employed for moving thebody is a rack and pinion, the slot being on the rack; but it is notnecessary to employ a rack and pinion, and, indeed, it may be preferablefor economic reasons to employ the device illustrated in Fig. 6. Thisdevice consists of an endless chain 6 on sheaves 7, mounted rotativelyon the frame and having in said chain a long slotted link 11, the slotin which is engaged by the stud 12 of the link 13. As in theconstruction previously described, the link is made of two bars toembrace the chain or rack laterally, as seen in Fig. 3. The chain (3 isoperated from the crank-shaft 9, about which it is wound. It may beproper to state that both endless chains and rack-aml-pinion deviceshave been before employed for operating the bodies of dumpingwagons; butso far as known they have not had the slotted connection with a rigidlink, as herein shown, and have not been so constructed as to push thebody back for dumping and pull it forward for righting it. Fig. 6 showsthe position of the chain and other points when the body has just begunto turn in dumping.

Haing thus described my invention, 1 claim 1. A dumping-wagon having aframe, a body mounted movably of the frame for dumping, and means formoving the body on the frame, said means having in it a slotted couplingof sufficient length to permit the body to turn in dumping withoutcommunicating its movement to the operator.

2. A dumping-wagon, having a frame, a body mounted movably on the framefor d umping, means mounted on the frame for moving the body, said meansbeing slotted, and a rigid link coupled to the body at its rear end andcoupled at its front end to said body-moving means on the frame throughthe medium of said slot, whereby the body may dump without communicatingits movement to the said means on the frame.

3. A dumping-wagon having a frame, a l )od y slidably mounted on theframe for dumping, a rack slidable in the frame, a means for drivingsaid rack, and a rigid link connecting said rack with the body, saidlink having a slotted connection atone of its ends, whereby the body maydump without communicating its movement to said rack.

4. A dumping-wagonhavinga frame,abody mounted slidably on the frame fordumping, a rack slidably mounted in the frame, a shaft rotativelymounted in the frame for operating said rack, and a link coupled at itsrear end to the wagonbod y forward of the fulcrumpoint, and having atits other end a slotted connection with said rack, whereby the body ispermitted to move in dumping without communicating its movement to therack.

5. A dumping-wagon,having a fr:une,a body mounted slidably on the framefor dumping, a rack slidably mounted in the frame and provided with akeeper-slot, a link coupled at its rear end to the body forward of thefulcrumpoint, a stud in the other end of the link which engages andcoacts with the keeper-slot in the said rack, and a pinion for operatingsaid rack.

6. A dumping-wagomhavinge frame,abody mounted slidably on said frame fordumping, fulcrum-studs and limiting-keepers on the frame and body tocontrol the movements of the dumping-body, a rack and pinion on theframe for operating the body, and a link coupling said rack to the bodyforward of the fulcrum-point, said link having a slotted eonneetion atits forward end to permit the body to dump Without imparting itsmovement to 10 the rack.

In witness whereof I have hereunto signed my name, this 29th day ofSeptember, 1903, in the presence of two subscribing Witnesses.

WILLIAM OSCAR SHADBOUL Witnesses:

HENRY CONNETT, WILLIAM J. FIRTH.

